EP0915235A3 - Hydraulic actuating system for an internal combustion engine valve - Google Patents

Hydraulic actuating system for an internal combustion engine valve Download PDF

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Publication number
EP0915235A3
EP0915235A3 EP98119578A EP98119578A EP0915235A3 EP 0915235 A3 EP0915235 A3 EP 0915235A3 EP 98119578 A EP98119578 A EP 98119578A EP 98119578 A EP98119578 A EP 98119578A EP 0915235 A3 EP0915235 A3 EP 0915235A3
Authority
EP
European Patent Office
Prior art keywords
hydraulic
valve
gas exchange
supply line
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98119578A
Other languages
German (de)
French (fr)
Other versions
EP0915235A2 (en
Inventor
Roland Barth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19749303A external-priority patent/DE19749303A1/en
Priority claimed from DE19752053A external-priority patent/DE19752053A1/en
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0915235A2 publication Critical patent/EP0915235A2/en
Publication of EP0915235A3 publication Critical patent/EP0915235A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic

Abstract

Die Erfindung betrifft eine hydraulische Betätigungsvorrichtung für ein Brennkraftmaschinen-Gaswechselventil (1), auf welches ein in einem Zylinder (22) geführter Stößel (21) einwirkt, der zum Öffnen des Gaswechselventiles (1) gesteuert durch zumindest ein elektrisch betätigtes Hydraulik-Ventil mit von einer Hochdruckpumpe (12) über eine Zufuhrleitung (13) bereitgestelltem Hydraulikmedium beaufschlagt wird, und wobei mit einem späteren Schließen des Gaswechselventiles (1) dieses Hydraulikmedium aus der Stößel-Zylinder-Einheit (20) über eine Abfuhrleitung (15) abgeführt wird. Erfindungsgemäß ist sowohl in der Zufuhrleitung (13,13') als auch in der Abfuhrleitung (15) ein als hydraulisches Sitzventil ausgebildetes Hydraulik-Ventil (14a,14b) vorgesehen, wobei dasjenige in der Zufuhrleitung (13') stromlos geschlossen und dasjenige in der Abfuhrleitung (15) stromlos offen ist. Beschrieben ist ferner ein sog. Drucksteigerungsglied (38), welches unter Ausnutzung strömungsdynamischer Effekte eine quasi selbsttätige Erhöhung des Hydraulik-Systemdruckes stromauf der Stößel-Zylinder-Einheit (20) bewirkt. Insbesondere soll die Abstimmung des Drucksteigerungsgliedes (38) und der relevanten Leitungslängen im hydraulischen System so erfolgen, daß das an sich bekannte Wasserschlagprinzip nutzbar ist.

Figure 00000001
The invention relates to a hydraulic actuating device for an internal combustion engine gas exchange valve (1), on which acts a plunger (21) guided in a cylinder (22), which is controlled by at least one electrically operated hydraulic valve with a for opening the gas exchange valve (1) a high-pressure pump (12) via a supply line (13) provided hydraulic medium, and with a later closing of the gas exchange valve (1) this hydraulic medium is discharged from the tappet-cylinder unit (20) via a discharge line (15). According to the invention, a hydraulic valve (14a, 14b) designed as a hydraulic seat valve is provided both in the supply line (13, 13 ') and in the discharge line (15), the one in the supply line (13') being closed and the one in the The discharge line (15) is open when de-energized. Also described is a so-called pressure-increasing element (38) which, using fluid dynamic effects, brings about a quasi-automatic increase in the hydraulic system pressure upstream of the tappet-cylinder unit (20). In particular, the adjustment of the pressure increasing element (38) and the relevant line lengths in the hydraulic system should take place in such a way that the water hammer principle known per se can be used.
Figure 00000001
EP98119578A 1997-11-07 1998-10-16 Hydraulic actuating system for an internal combustion engine valve Withdrawn EP0915235A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19749303 1997-11-07
DE19749303A DE19749303A1 (en) 1997-11-07 1997-11-07 Hydraulic activating device for internal combustion engine gas valve
DE19752053A DE19752053A1 (en) 1997-11-25 1997-11-25 Hydraulic actuator for internal combustion engine gas changeover valve
DE19752053 1997-11-25

Publications (2)

Publication Number Publication Date
EP0915235A2 EP0915235A2 (en) 1999-05-12
EP0915235A3 true EP0915235A3 (en) 1999-06-16

Family

ID=26041420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119578A Withdrawn EP0915235A3 (en) 1997-11-07 1998-10-16 Hydraulic actuating system for an internal combustion engine valve

Country Status (1)

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EP (1) EP0915235A3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19928560C2 (en) * 1999-06-22 2002-02-07 Bayerische Motoren Werke Ag Torque control system for internal combustion engines in motor vehicles with an actuating device for variable valve control
DE10134644A1 (en) * 2001-07-17 2003-02-06 Bosch Gmbh Robert Electro-hydraulic valve control
ITBO20030389A1 (en) * 2003-06-23 2004-12-24 Magneti Marelli Powertrain Spa ELECTROHYDRAULIC VALVE OPERATION GROUP
ITMI20051810A1 (en) * 2005-09-28 2007-03-29 Dellorto Spa ELECTRO-HYDRAULIC CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE VALVES WITH VARIABLE DRIVE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736595A1 (en) * 1987-10-29 1989-05-11 Teves Gmbh Alfred Hydraulically actuated valve control for internal combustion engines
FR2624911A1 (en) * 1987-12-19 1989-06-23 Lucas Ind Plc OPERATING DEVICE FOR ENGINE VALVE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2010291A1 (en) 1970-03-05 1971-09-23 Robert Bosch Gmbh, 7000 Stuttgart Control of inlet and outlet valves in internal combustion engines by liquid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736595A1 (en) * 1987-10-29 1989-05-11 Teves Gmbh Alfred Hydraulically actuated valve control for internal combustion engines
FR2624911A1 (en) * 1987-12-19 1989-06-23 Lucas Ind Plc OPERATING DEVICE FOR ENGINE VALVE

Also Published As

Publication number Publication date
EP0915235A2 (en) 1999-05-12

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